diff --git a/web/packages/gallery/services/upload/upload-service.ts b/web/packages/gallery/services/upload/upload-service.ts
index 6eb7fb383e..0a6e6f2e7f 100644
--- a/web/packages/gallery/services/upload/upload-service.ts
+++ b/web/packages/gallery/services/upload/upload-service.ts
@@ -1078,7 +1078,7 @@ const extractImageOrVideoMetadata = async (
     };
 
     if (duration) {
-        metadata.duration = ensureNumber(duration);
+        metadata.duration = ensureInteger(Math.ceil(duration));
     }
 
     const location = parsedMetadataJSON?.location ?? parsedMetadata?.location;
diff --git a/web/packages/media/file-metadata.ts b/web/packages/media/file-metadata.ts
index f3fdee0318..900dd89f4a 100644
--- a/web/packages/media/file-metadata.ts
+++ b/web/packages/media/file-metadata.ts
@@ -141,9 +141,11 @@ export interface Metadata {
      */
     videoHash?: string;
     /**
-     * The duration (in seconds) of the video.
+     * The duration (in integral seconds) of the video.
      *
-     * Only present for videos (`fileType == FileType.video`).
+     * Only present for videos (`fileType == FileType.video`). For compatibility
+     * with other clients, this must be a integer number of seconds, without any
+     * sub-second fraction.
      */
     duration?: number;
     hasStaticThumbnail?: boolean;